CPC B60S 1/52 (2013.01) [B05B 1/14 (2013.01); B05B 1/3006 (2013.01); B08B 3/02 (2013.01); F04B 39/121 (2013.01); B60S 1/56 (2013.01)] | 3 Claims |
1. A vehicle cleaning device comprising:
a cylinder to which a cleaning fluid is supplied;
a piston that is slidably inserted in the cylinder;
a spray nozzle unit that is mounted at a leading end of the piston protruding from the cylinder, the spray nozzle unit being configured to spray the cleaning fluid toward an object-to-be-cleaned; and
a cap that closes a gap between the cylinder and the piston in an opening of the cylinder through which the piston protrudes, wherein:
the cap includes a tubular part located inside the cylinder;
the tubular part defines an end of movement of the piston in a direction in which the leading end of the piston moves away from the cylinder;
a communication groove is provided in an outer peripheral surface of the tubular part; and
a communication hole is provided between the communication groove and an inner peripheral surface of the cylinder, and the gap between the cylinder and the piston communicates with an outside of the cylinder through the communication hole;
wherein an air hole that communicates with the communication hole is provided in the cylinder; and
wherein an opening of the air hole in an outer peripheral surface of the cylinder is smaller than an opening of the air hole in the inner peripheral surface of the cylinder.
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